Preparation for slowly liberating oxygen.



UNITED STATES PATENT OFFICE.

LEOPOLD SAMSON, OF HIRSCHGARTEN, NEAR BERLIN, GERMANY.

PREPARATION'FOR SLOWLY LIBERATING OXYGEN.

No Drawing.

To all whom it may concern:

Be it known that I, LEOPOLD SARASON, a subject of the German Emperor,residing at Hirschgarten, near Berlin, German Empire, have inventedcertain new and useful Improvements in Preparations for SlowlyLiberating Oxygen, of which the following is a specification.

As is well known, hydrogen peroxid, sodium peroxid, sodium perborate,sodium percarbonate, and analogous preparations, liberate their looselycombined oxygen very readily if they come in contact with catalyticagents. They thus decompose to some extent even during storage, sinceparticles of dust and the walls of the storage-vessels also act ascatalytic substances. Also in their employment in medicine and hygiene,and in technical bleaching processes, premature and undesirableliberation of oxygen occurs, owing to the continual presence ofcatalytic substances. I have ascertained, however, that bythe additionof pyrophosphates of the alkalis (especially sodium pyrophosphate), thekeeping quality of the abovementioned substances, both in dry form andin solution, can be considerably increased, in such manner that they arealtered in a much lower degree by catalytic agents than when withoutsuch additions. Pyrophosphates, furthermore, essentially increase thestability of said oxygen-containing substances against the influence ofheat. By means of the present invention, therefore, a much bettereconomic exploitation of the oxygen at disposal can be effected.

A suitable preparation may be obtained by mixing, for instance, equalparts of sodium Specification of Letters Patent.

Application filed November 12, 1908. Serial No. 462,260.

Patented Aug. 8, 1911.

perborate (Na B,O -|10H O) and sodium pyrophosphate (Na P O e inventioncan be carried out in divers ways. For instance, the said additionalsubstances, and the compounds containing loosely combined oxygen withwhich they are to be mixed, may be in a dry state. Or else the saidadditional substances, or the compounds, or both, may be in liquid form.Or solutions of the dry compounds containing loosely combined oxygen maybe carefully crystallized in common with solutions of the saidadditional substances.

Having thus described my invention, I claim as new 1. A preparation forslowly liberating oxygen, consisting of a compound containing looselycombined oxygen, and an alkali pyrophosphate.

2. A preparation for slowly liberating oxygen, consisting of a compoundcontaining loosely combined oxygen, and sodium pyrophosphate,

3. A preparation for slowly liberating oxygen, consisting of a compoundcontaining loosely combined oxygen, and an alkali pyrophosphate, in astate of common crystallization.

4. A preparation for slowly liberating oxygen, consisting of a compoundcontaining loosely combined oxygen in a dry state, and an alkalipyrophosphate in a dry state.

In testimony whereof I aflix my signature in presence of two witnesses.

. LEOPOLD SARASON.

Witnesses:

LEOPOLD MATTAUSCH, ANroN HASSLER.

